Heating system



July 22 1924. 1,502,341

E. G. LOOMIS HEATING SYSTEM Filed Feb. 28 1922 INVE/V TOR Patented July22, 1924.

UNITED STATES EVARTS G. LOOMIS, OF NEWARK, NEW JERSEY.

HEATING SYSTEM.

Application filed Tebruary 28, 1922. Serial No. 538,860.

To all whom it may concern:

Be it known that I, EVARTS G. Loomrs, a citizen of the United States,and a resident of the city of Newark, in the county of Essex and Stateof New Jersey, have invented a certain new and useful Improvement inHeating Systems, and do hereby declare that the following is a full,clear, and exact description thereof.

My invention relates particularly to a system for heating materials at acomparatively high temperature in an advantageous manner. While myinvention is capable of application for heating materials and vessels ofall kinds, it is particularly applicable for heating camphor stills.

The object of my invention is to provide a heating system by means ofwhich materials may be heated to a comparatively high temperature anduniformly over an extended period of time and without danger in theoperation of the system. The object of my invention is, furthermore, toprovide a heating system based upon the utilization of a heated fluidas, for example, a heavy oil. More particularly the object of myinvention is to provide a heating system, in which there is an automaticcontrol of the temperature, in which there is very little labor requiredin operating the same, in which the fluid medium is maintained under nopressure other than the head of the liquid, in which the pump is locatedbeyond the heating apparatus so as to act as a suction pump and avoiddanger due to excessive pressure,

in which an expansion tank is provided to ompensate for the changes involume due to the change in temperature, and to act as a safet valve, inwhich the system can be drained advantageously, in which the drainoutlet is at the lowest oint, in which a gas vent is located at theiiighest point, and in which the arrangements is suchthat gases cannotcollect in the apparatus. Further objects of my invention will appearfrom a detailed description'thereof contained hereinafter.

While my invention is capable of embodiment in many different forms, forthe purpose of illustration I shall only show one form of my inventioninthe accompanying drawings, m which- The figure is a diagrammaticrepresentation of a heating apparatus made in accordance with myinvention shown as applied to a camphor still.

In the drawings I have shown an apparatus comprising a camphor still 1,having an outlet pipe 2, provided with a hand valve 3, which is tobeheated by the oil system. Said pipe 2 connects with a chamber 4 in whichthe camphor is to be allowed to solidify by cooling. In order to heatthe camphor in the still an oil heating system is provided. The oilheating system comprises a main supply tank 5 having an inlet pipe 6,adapted to be heated by a steam coil 8, so as to enable the oil to berendered sufiiciently fluid to enable it to be drawn out of the tank 5,through a pipe 9 by a pump 10 and delivered through a hand-valve 11 to apipe 12. One end of the pipe 12 is connected to a heating tank 13 havinga cast iron grid 14 connected by wires 15 and 16 to. any suitable sourceof electric current. The cast iron grid 14 is comprised of a pair ofparallel rods 17 and 18 supporting a plurality of folded strips 19, theends of which are adapted to fit over the rods. Plates of mica 20 areinterposed in every alternate joint between the strips 19 so that inthis manner the current is compelled to pass backwardly and forwardlyover the strips 19. The tank 13 is connected by a pipe 21 to anotherheating tank 22 having a cast iron grid electric resistance 23, the samein construction as the grid 14, this grid 23 being also supplied withcurrent from the wires 15 and 16. In the tank 22 there is a thermometer24, which is connected to a thermostat 25 located in the wires 15 and 16so that the temperature in the tanks 13 and 23'may be automaticallymaintained constant. An outlet pipe 26 conveys the heated oilfrom thetank 22 to a pump 27 which in turn is connected by a pipe 28 to a gasventing tank 29 having a pipe 30 controlled by a hand valve 31 so thatthe gas which accumulates in the tank may be allowed to escape to theatmosphere from time to time.

Below the pipe 30 there is a funnel 32 connected by a pipe 33 to themain supply tank 5 so that any liquid escaping from the tank 29 may bereturned to said supply tank. Furthermore, leading down into the body ofoil in the tank 29 there is a pipe 34 containing a weighted flap valve35 which pipe leads to an expansion reservoir 36 having a floatindicator 37 and an overflow pipe 38, which leads back to the main sup1y tank 5. The valve 35 is normally closed, ut can be r adily openedautomatically in of in,

creasing pressure in the system.' From the bottom of the tank 29 thereis a pipe 39 con- .nected by a by-pass pipe 40 to the pipe 12,

which by-pass pipe 40 has a hand valve 41 therein. Furthermore, betweenthe pipes 39 and 12, there is a coil 42 located inside of the still 1,which has an inlet valve 43 and an outlet valve 44, both of which arehand-operable. Furthermore, leading from the pipe 39 there is a tube 45having a hand valve 46 located in a reversly directed larger tube 47,both of which extend into the pipe 2 through an end cover plate 48thereon, and from the pipe 12 there is a tube 49 having a hand valve 50,which leads to one side of the tube 47. In the ends of the pipes 39 and12 there are hand valves 51 and 52 respectively.

In the operation of my invention, let it be assumed that a body ofcamphor in the still 1 is to be heated, and that thereafter the heatedcamphor is to pass over into the chamber 4, where it is to be allowed tocondense and solidify. A body of heavy petroleum oil is introduced intothe tank 5 through the filling pipe 6. The steam is now turned into thecoil 8 so as to render the oil fluid. Thereupon, the valve 11 beingopened, and the valves 51, 52 and 31 being closed, the pump 10 isstarted so as to supply to the s stem sufiicient oil to fill the same.When t e system has been thus filled, any air which has accumulated hasbeen allowed to escape by the temporary opening of the valve 31, andthrough the vent opening at the top of the tank 36. The pump 10 isstopped, the valve 11 is closed, and the valve 41 is closed. Thereuponthe pump 27 is started and current is supplied over the wires 15 and 16.Furthermore, the weighted valve 35 is moved into closed position.Thereupon by the operation of the pump 27' the oil which becomes heatedby the grids 14 and 23 is circulated through the still 1,

and through the tubes 45 and 47 so that the camphor in the still 1 andin the pipe 2 is maintained at the desired temperature which would be inthe neighborhood of 500 F. If the camphor in the still is to besubjected to heat treatment before being allowed to pass into thechamber 4, the valve 3 is maintained closed for the desired period oftime and is thereafter opened. The thermostat 25 maintains thetemperature of the oil substantially constant. The valve 31 is openedfrom time to time to permit the escape of gas formed in or accumulatingin the oil. Any liquid passing out from the pipe 30 is returned by thepipe 33 to the tank 5. Any expansion in the oil due to heating isrelieved by the pipe 34 communicating with the tank 36. Any overflowfrom the tank 36 passes back into the tank 5. There is no danger ofexcessive pressure in the heating tanks 13 and. 22, as the pump 27 islocated beyond the same and acts as a suction pump. Furthermore when itis de:.

done without draining the reservoir 36 owing to the presence of thevalve 35. Again, while the heating operation is being carried on if, forany reason, it is desired to partially or entirely discontinue theheating of the camphor still temporarily this can be done by opening theby-pass valve 41 partially or entirely. In this way the heating systemworks uniformly continuously and at the desired high temperature withoutdanger to those operating the same.

While I have described my invention above in detail, I wish it to beunderstood that many changes may be made therein without departing fromthe spirit thereof.

Iclaim:

1. A heating system comprising a fluid medium circulating means, meansfor heating said medium, a heated supply tank for the circulating means,and an expansion reservoir connected to the system, the expansionreservoir being connected by an overflow pipe to the supply tank.

2. A heating system comprising a fluid medium circulating means,electrical means for heating said medium, a heated supply tank for thecirculating means, and an expansion reservoir connected to the system,

the expansion reservoir being connected to an overflow pipe to thesupply tank.

3. A heating system comprising a fluid medium circulatin means,electrical thermostatically-contro led means for heating said medium, aheated supply tank for the circulating means, and an expansion reservoirconnected to the system, the expansion reservoir being connected by anoverflow pipe to the supply tank.

4. A heating system comprising a fluid medium circulating means, meansfor heating said medium, a supply tank for the circulating means, and anexpansion reservoir connected to the system, the expansion reservoirbeingconnected to the system by an automatically-opening valve.

5. A heating system comprising a fluid medium circulating means,electrical means for heating said medium, a supply tank for thecirculating means, and an expansion reservoir connected to the system,the expansion reservoir being connected to the system lly anautomatically-opening valve.

6. heating system comprising a fluid medium circulating means,electrical thermostatically-controlled means for heating said medium, asupply tank for the circulating means, and an expansion reservoirconnected to the system.

7. A heating system comprising a fluid medium circulating means,electrical means forkheating said medium, and a gas vent tan 8. Aheating system comprisin a fluid medium circulatin means, electricalther-,

- .mostatically-contro led means for heating said medium, and a gas venttank.

9. A heating system comprising a fluid medium circulating means,electrical means for heating said medium, a supply tank for thecirculating means, and a as vent tank arranged to return liquid discarged therefrom to the supply tank.

10. A heating system comprising a fluid medium circulating means, meansfor heating said medium, and a pipe adapted to be heated by the systemcontaining a portion of said system internally.

11. A heating system comprising a fluid medium circulating means,electrical means for heating said medium, and a pipe adapted to beheated by the system containing a portion of said system internally.

12. A heating system comprising a fluid medium circulating means, meansfor heating said medium, and a pipe adapted to be heated by the systemcontaining a portion of said system internally, which passes out of theend of the pipe;

13. A heating system comprising a fluid medium circulating means,electrical means for heating said medium, and a pipe adapted to beheated by the system containing a portion of said system internally bymeans of telescoping pipes, which passes out of the end of the pipe.

14. A heating system comprising a fluid medium circulating means, andelectrical means for heating said medium, said pump being located at thedischarge end of the heating means.

In testimony whereof, I have hereunto set my hand and seal this 24th dayof February, 1922.

EVARTS G. LOOMIS.

